Quarterly report pursuant to Section 13 or 15(d)

Revenues - Activity (Details)

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Revenues - Activity (Details) - USD ($)
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
 [1]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance   $ 1,635,000  
Provision related to current period sales $ 3,100,000 5,956,000  
Credit or payments made during the period   (4,230,000)  
Balance 3,361,000 3,361,000  
Other accrued liabilities 6,806,000 6,806,000 $ 3,598,000
Accounts receivable and prepaid and other current assets      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Provision related to current period sales   810,000  
Chargebacks, Discounts and Fees      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance   622,000  
Provision related to current period sales   3,561,000  
Credit or payments made during the period   (2,932,000)  
Balance 1,251,000 1,251,000  
Government and Other Rebates      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance   843,000  
Provision related to current period sales   2,296,000  
Credit or payments made during the period   (1,298,000)  
Balance 1,841,000 1,841,000  
Returns      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance   170,000  
Provision related to current period sales   99,000  
Balance $ 269,000 $ 269,000  
[1] The balance sheet at December 31, 2018 has been derived from the audited financial statements included in Rigel’s Annual Report on Form 10-K for the year ended December 31, 2018.